package main

import "fmt"

func main() {
	//fmt.Println("我的体重为：",150*0.3783,"斤，我的年龄为：",34*365/687,"岁.")
	//fmt.Printf("我的体重为：%v斤，我的年龄为：%v岁。",150*0.3783,34*365/687)
	// fmt.Printf("体重为：%v斤\n", 150*0.3783)
	// fmt.Printf("我的年龄为：%v岁\n", 34*365.00/687)

	// fmt.Printf("%-15v $%4v\n", "SpaceX", 94)
	// fmt.Printf("%-15v $%4v\n", "Virgin Galactic", 100)

	// const lightSpeed = 299792 // km/s
	// var distance = 56000000   //km
	// fmt.Println(distance/lightSpeed, "seconds")
	// distance = 401000000
	// fmt.Println(distance/lightSpeed, "seconds")

	// const spacexSpeed = 10800 // km per hours
	// var distance = 96300000   //earth to mars
	// var hoursPerDay = 24
	// fmt.Printf("need %v days from earth to mars.", distance/spacexSpeed/hoursPerDay)

	fmt.Println(randNum(10))
	calcSpeed()
	testContains()

}
